Gunners forward Gabriel Jesus levelled with a closerange finish after 25 minutes, before substitute Gabriel Martinelli cut inside 17-year-old rookie full-back James Scanlon to score the winner.
With the Georgia defence still reeling from the opener, Kenan Yildiz was denied a second inside two minutes after a VAR review spotted he had strayed offside before a close-range finish.
Bryan Luiz volleyed Costa Rica ahead on 24 minutes, before Napoli striker Dries Mertens equalised from closerange. Lukaku scored either side of half-time and then set up Michy Batshuayi to tap home Belgium's fourth.
As the clock ticked down in stoppage time at the Leipzig Stadium, Porto youngster Conceicao, making his first competitive appearance for Portugal, netted from closerange after Czech Republic failed to clear a low cross from fellow substitute
Havertz, who came on as a substitute, eventually broke the deadlock with a close-range header in the 89th minute. Arsenal moved up to first place with 30 points from 13 games, one ahead of City and two ahead of Liverpool.
Luton quickly improved and pulled a goal back through Carlton Morris' close-range header before dominating. Ross Barkley's header hit the bar but United won to consolidate sixth place.
Uruguayan Federico Valverde put the European champions ahead after 59 minutes from closerange and Mbappé fired the ball into the top corner from Jude Bellingham's pass to double the advantage nine minutes later.
A sensational long-range drive from Vinicius Jr gave Madrid an early lead at the Bernabeu. Bellingham then scored his 19th goal of the season from a sublime Vinicius pass before converting from closerange after half-time.
They pushed him off the motorcycle and shot him at closerange,'' the resident said. The assailants, however, spared the victim's friend who was on the motorcycle with him.
Ronaldo poked home from closerange in the 37th minute at the Estadio Algarve to make it goal No 112 before being withdrawn at half-time. Jose Fonte and Andre Silva added more goals in the second half.